Flow near a plate suddenly set in motion
Stokes first problem
Figure: Flow near a plate suddenly set in motion.
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Flow near a plate suddenly set in motion
Figure: Transient flow due to the sudden motion of a plate.
Velocity profiles at t/l2=0.0001, 0.001,

Motion of a Fluid
The motion of a fluid can be determined, when the velocity at every point of
the space is occupied by fluid motion.
Therefore, to express the velocity with independent variables, there are two
distinct methods available,
(i) Lagrangian